A chicken farmer goes into a local tavern¹, takes a seat at the bar next to a woman, and orders a glass of champagne². The woman perks³ up and says, "How about that? I just ordered a glass of champagne, too!" He turns to her and says, "What a coincidence. This is a special day for me, I'm celebrating." "This is a special day for me, too, and I'm also celebrating," says the woman. "What a coincidence," says the man. They clink glasses and he asks, "What are you celebrating?" "My husband and I have been trying to have a child. Today, my gynecologist told me I'm pregnant!" "What a coincidence," says the man. "I'm a chicken farmer. For years all my hens were infertile⁴, but today they're finally fertile." "That's great," says the woman. "How did your chickens become fertile?" "I switched cocks," he replies. "What a coincidence," she said.